Fuel-mixing and supercharging device



@sie 29 EQ2@ wggw F, J. LARONDE FUEL MIXING AND SUPERCHRGING DEVICE m ATTORNEY Det. 2, 1928.

` 1,686,413 P. J. LARONDE FUEL MIXING AND SUPERGHARGING DEVICE Filed March 29, 1927 2 Sheets-Sheet 2 BY M,

ATTORNEY Patented Oct. 2, 1928.

UNITED STATES PHILIP JOSEPH LARONDE, OF MANCHESTER, NEW I-IAMIIPSHIRE.l

FUEL-MIXIN AND SUPERCHARGING DEVICE.

Application filed March 29, 1927. Serial No. 179,381.

This invention relates to devices used in conjunction wlth an internal combustion engine for feeding a fuel mixture thereto.

rlhe Aprincipal object of the present inven-f flow of the' resulting mixture or atomized 4 liquid fuel, and for forcing the said mixture or atomized liquid fuel into the intake of an internal combustion engine.

lVith the foregoing and other objects in view, the invention resides in the particular provision, relative disposition, and functions of the parts of the device.

The nature of the invention and its distinguishing features and advantages will appea-r when the following specification is read in connection with the accompanying drawing, in which Figure v1 is a longitudinal sectional view through the device embodying the present invention and illustrating particularly the high speed nozzle, and the automatically operable air controlling means associated with said nozzle.

Fig. 2 is a view similar to Fig. 1 and illustrating particularly the primary nozzle and auxiliary air intake. l

Figs. 3, 4 and 5 are transverse sectional views respectively taken 0n the lines 3-3, 4-4 and 5-5 of Fig. 1.

The invention may be and in the illustrated embodiment use is made of a casting 1() of suitable material. The casting is cylindrical and of hollow construction provided at one end with a ange 11 for connecting the casting with a part of an internal combustion engine at the intake opening. The casting 10 is divided into three chambers, a chamber 12 at one end, an intermediate chamber 13 and a chamber 14 at the opposite end, by transverse walls or partitions 15 and 16. The wall of the chamber 12 con.

verges toward an outlet opening 12, and in fact forms a tapered tube. ing 12 will correspond in size with the intake opening of the internal combustion engine. 4

A suitable fan 17 is arranged in the tube 12. This fan is mounted on one end of the shaft 18 of an electric motor 19 0f any suitable construction. The motor is arranged in the chamber `14 of the casting 10. One end of the shaft 18 is journaled in-a suitable bearing 20 diversely formulated,-

The outlet opena needle'valve member adapted for 'adjustment as at 40 in the wall of the chamber 31.

on the end wall 21 of the casting 10, and said shaft extends through a bearing 22 formed with or secured to the walls 15 and 16. The

motor 19 serves for rapidly rotating the fan 17.l This motor may be arranged exteriorly of the casting 10 if desired, and any other suitable means may be employed i'n lieu of the motor, for rotating the fan 17.

Air is admitted into the device through and by virtue of a primary air intake pipe 23 connected at one end with an elbow 24 formed with the casting 10 and in communication with the interior of the chamber 14 as at,y 25. The pipe 23 will extend to a convenient location adjacent the exhaust pipe of the engine so that the air drawn in the pipe will be heated. Arranged in the elbow 23 is a choke or throttle valve 26 which will be connected with suitable means for operating the same to control and regulate the admission ofl the hot air.

A small casting 27 having a-flange 28 secured to flange 29 on the casting 10, as at 30 provides a liquid fuel and float chamber 31. There is arranged in the chamber 31 an annular fioat 32 of suitable material. The float has connected therewith a needle valve member 33 by the use of a lever 34;. The needle valve member 33 controls the admission of liquid fuel through an inlet passage 35 communicating with the interior of the chamber 30 and a liquid fuel feed pipe 36.

The chamber 13 serves as the mixingchamber in which the air and liquid fuel are brought together to be mixed. The lower part of the wall 16 is at one side provided with an opening 37. Arranged adjacent the opening 37 is a primary nozzle 38. The nozzle 38 may be of any suitable construction and will include means 39 for controlling and regulating the flow of liquid fuel therethrough. The nozzle 38 extends through the lower wall ofthe mixing chamber 13, and this lower wall vis'curved downwardly. The nozzle 38 is disposed/ preferably at an angle, and inclines upwardly toward theoutlet end `of the device. The means 39 is in the form of It will now be understood that liquid fuel may pass from the chamber 31 into the mixing chamber 13 through the nozzle 38, and that the amount of liquid fuel passing through the said nozzle may be regulated. The liquid fuel passing through the nozzle of the fuel mixture from the4 mixing chamber 13 to the tube 12, there is provided a throttle valve member 41 which is hingedly connected as at 42. The valve member 41 coacts with a lower wall portion of the casting 10 to establish and disestablish communication between the chambers 12 and 13. The valve member 41 has' connected therewith an arm 43 which will also be connected with suitable means for manually operating the valve member 41. After the engine has been started, and with the valve member 41 in an opened phosition, air will be drawn inthrough the i let 25, and through the opening 37, and at the same time liquid fuel will be drawn in through the nozzle 38 from the chamber 31 and both air and liquid fuelwill be thoroughly mixed together. Vith the motor 19 in operation, the fan 17 will be rotated rapidly and as a result the fuel mixture will be forced through the outlet opening 12 into the intake opening with which the device is connected. The action of the fan 17 on the mixture will produce a suitable charging ef -fect thereby giving powerful fuel charges,

said fan serving Vat the same time to supplement the mixing action produced by the suction on the nozzle 38. l

The nozzle 38 serves adequately for supplying the necessary fuel mixture,l either rich or lean for running at comparatively low rates of speed.

In order to provide the proper mixture for the engine when running at high speed, there is provided a high speed nozzle 44 of any suitable construction. This nozzle 44 extends through the lower wall of the mixing chamber 13 and is inclined upwardly and forwardly toward th outlet end of the device, in a manner similar to that in which the nozzle 38 is arranged. The outlet passage of the nozzle 44 is controlled by a needle valve member 45 connected with a lever46 supported by the bearing 22. A portion' of the lever '46 coacts with a head 47 on a stem 48 of a valve member 49. The valve member 49 coacts with a seat 50 surrounding an opening 51 in the lower part of the wall 16 di-v 5 52 is connected with the guide 53 and the opposite end thereof is connected with the head 47. It will be apparent that when the engine is running at a comparatively high speed, and the suction is great, that valve member 49 under the action of suction will be moved from its seat 50, causing the operation of the lever 46 and therefore the movement of the Valve member 45 to an open position. It follows therefore that air will be allowed to enter the mixing chamberthrough the opening 51 and liquid fuel will be allowed to enter the mixing chamber through the.

nozzle 44 to provide an auxiliary mixture of liquid fuel and air in addition to that furnished by the action of the nozzle 38 and opening 37. It will be apparent that the admission of liquid fuel through the nozzle 44, and the admission of air through the opening 51 will be controlled automatically.

From the foregoing it should .be obvious that the arrangement of the nozzles 38 and 44 with respect to the throttle valve member 41 is such that the mixture will iow smoothly into 'the converging tube 12 to the action of the fan 17 that comparatively short nozzles may be used; and that the nozzles will b e near the level of the liquid fuel in the chamber 31.

In nearly all internal combustion engines manufactured in recent years, the engine block is so designed that two intake valves of two cylinders are contained in the same intake opening. For afour cylinder engine, two devices would be used, and three for a six cylinder en gine, etc. The extra cost would be offset by the reduction in cost of an intake manifold which would be eliminated.r It is to be understood, however, that one device may be used in conjunction with a manifold connected with the intake valves to supply the mixture to all of the cylinders.

Having thus described my invention, I claim:

A carburetor comprising a casting, a plurality of partitions dividing the casting into an intermediate chamber and end chambers disposed in alinement, a pair of fuel nozzles projecting into the intermediate chamber, one of the partitions having an opening in the lower portion, a throttle valve closing the opening, a fan mounted in the end chamber adjacent the' throttle for aiding in forcing a combustible mixture from the intermediate chamber and through the end chamber, means located in the other end chamber for causing rotation of the fan, the partition adjacent the second end chamber having openings adjacent the lower end thereof, an opening being in line with a nozzle, a casting adjacent the second mentioned chamber and provided with a valve controlled air inlet, a valve controlling one of the openings in the second mentioned partition and automatically moved by the air to open position, a valve controlling the nozzle adjacent the last mentioned opening and'actuated 1n accordance with Ithe position-of the air actuated valve.

PHILIP JOSEPH LARONDE. 

